toJson method

Implementation

core.Map<core.String, core.dynamic> toJson() {
  final createTime = this.createTime;
  final messageId = this.messageId;
  final systemMessage = this.systemMessage;
  final userMessage = this.userMessage;
  return {
    'createTime': ?createTime,
    'messageId': ?messageId,
    'systemMessage': ?systemMessage,
    'userMessage': ?userMessage,
  };
}